Reamer



(No Model.)

J. NBALE.'

' BEAMER.

No. 830,508. 41 at81n8ed- Nov. 17, 1885.

@Ntra Srafrns arnNr rrrcn.

JAMES NEALE, OF BBIDGEPORT, CONNECTICUT.

REAlVlER.

SPEGEFCATION forming part of Letters Patent No. 330,508, dated November17,1885` Application filed April 18, 1985.

To all whom it may concer-m Be it known that I, JAMES NEALE, of the cityof Bridgeport, in the county of/Fairield and State ot' Connecticut, haveinvented a new and useful Improvement in Beamers, of which the followingis a specification.

My invention relates to reamers which consist of a shell or body andcutters detachably secured therein; and the invention consists in anovel construction'of the shell` or body of thereamer, and in the novelcombination therewith of detachable cutters, as hereinafter described,and pointed out in the claims.

In the accompanying drawings, Figure l is a longitudinal section of areamer embodying my invention. Fig. 2 is a transverse section thereof onthe plane of the dotted line fr x, Fig. l. Fig. 3 is a transversesection on the plane ofthe dotted line jz/ y, Fig. l. Fig. 4 is acentral longitudinal section of a reamer embodying my invention in aslightly modied form. Fig. 5 is a transverse section on the plane ofthedotted line z z, Fig. 4. Fig. 6 is a similar section on the plane of thedotted line l l, Fig. 4. Fig. 7 is a central longitudinal section of areamer of slightly modified form also embodying my invention, and Fig. 8represents a transverse section on the plane of the dotted line 2 2,Fig. 7.

Similar letters of reference designate corresponding parts in all thefigures.

Referring first to Figs. l, 2, and 3, A designates a portion of theshank of a reamer, and B the shell or body, in which are detachablysecured cutters C C. The reamer here shown has ive cutters arranged atequally-distant points around its circumference, but larger or smallerreamers may have a greater or less number of cutters, as may be desired.

The cutters C consist of straight pieces of steel having parallel sidesand dropped into grooves b of corresponding form in the shell Y or bodyB. These groovesbare not dovetailed but have parallel sides, and thecutters C may be introduced into and removed from them in a lateraldirection. The shell or body B has at its inner end a screw-threadedprojection, b', entering a socket, c, in the shank portion A, and theend of the shank portion A around said socket a is undercut or beveledinward so as to form a dovetailed shoulder, adi The Shell or body B hasnear its outer end a cir- Serial No. 162,649. (No model.)

cumferential 0`roove b2 asbest shownin Fi s.

1 and 3, thereby forming beyond the groove a fixed collar, the innerfaceor side of which is inclined or beveled inward, as shown at b Thegrooves b in the shell or body B extend from the inner end thereofoutward to the circumferential groove b2, and the cutters C, which Varefitted in the grooves b, extend from the shoulder' a* to the shoulder(ft, and have their ends beveled or inclined corresponding to theseshoulders. The shell or body B has at the outer end a square orpolygonal head, b3, to which wrench may beapplied for screwing the shellor body into the shank portion, and the cutters C, having beenpreviously placed in their grooves or seats b,will then be confined andheld against outward movement by their inclined or beveled ends fittingagainst and under the inclined or beveled shoulders a* 5*.

In order to give proper clearance for chips, the portions of the shellor body which are between the grooves b are grooved or cut away, asrepresented at b* in Fig. 2, and it will be observed that these groovesor channels b* extend inward at one edge nearlyto the bottom of thegrooves b, but at the other edge do not extend to the grooves b. By thisconstruction an ample shoulder or body of metal, b5, is afforded at theback of each cutter to support it and still ample clearance for chips isafforded. If by reason of wear on the cutters the reamer does cut up tothe standard size, then paper may be introduced into the grooves b underthe cutters C, or the cutters may be thrown away and new ones supplied,which may be done very cheaply. Very little steel is used in thecutters, and hence this construction enables the very nest steel to beused for the cutters without adding greatly to theexpense of the reamer.

I will now turn to Figs. 4, 5, and 6, which show a reamer, but slightlydifferent from that previously described. The shank A has a socket, ci,int-o which is screwed a stud, b, projecting from the shell or body B,and the shell or body Bhas at its outer end a screw-threaded stud orprojection, b, on which is placed a collar, B', and a nut, B2.

The cutters C fit in grooves b, as before described, and are inclined orbeveled at their ends and it against corresponding inclined or IOObeveled shoulders, a* 5*, upon the shank portion A and collar B. Theshell or body B between the grooves b which form the cutterseats isgrooved or channeled, as shown at b4, in order to afford properclearance for chips, and such grooves or channels extend on their sideswhich are rearmost nearly to the bottom of the groove b, While on theopposite sides they do not extend quite to the grooves b, therebyforming an ample body of metal t0 support the back of the cutter.

In Figs. 7 and 8 I have represented a reamer which embodies my inventionin a slightly modified form. In this example of the invention the shankportion A and the shell or body B are made in one piece,which is formedwith a circumferential groove or recess, b2, the rear or inner side ofwhich is beveled `or inclined inward so as to form the shoulder a* onthe shank at its junction with the shell or body. At the outer end ofthe shell or body is a screw-threaded stud, b, on which are a Washer orloose collar, B, and a nut, B2. The cutters C are fitted to grooves orseats b,which extend from the circumferential channel or recess b2 tothe forward end of the body or shell, and the cutters C are held atopposite ends between the inclined or beveled shoulders a* If, theformer on the shank A and the latter on the collar B.

That I claim as my invention, and desire to secure by Letters Patent,is-

1. The combination of a reamer shell or body provided With longitudinalgrooves or cutter-seats having parallel sides, a shank portion having atits junction with one end of the shell or body an inclined or beveledshoulder, ai@ a collar at the other end of the shell or body forming aninclined or beveled shoulder, bi, and cutters C, fitted to the saidgrooves or cutter-seats and having their ends inclined or beveled to fitthe inclined or beveled shoulders a* lik, substantially as hereindescribed.

2. The combination of a reamer shell or body provided with longitudinalgrooves or cutter-seats having parallel sides and grooved at b4 betweenthe cutter-seats to afford clearance for chips, a shank portion havingat its junction with one end of the shell or body an inclined or beveledshoulder, a*, a collar at the other end of the shell or body forming aninclined or beveled shoulder, b*, and cutter C, fitted to the saidgrooves or cutter-seats and having their ends inclined or beveled to fitthe inclined or beveled shoulders a* b*, substantially as hereindescribed.

3. The combination,with the shank portion A, having an inclined orbeveled shoulder,a*, of the shell or body B, screwed into said shankportionv A, having near its outer end a circumferential recess orgroove, b2, forming beyond the recess or groove a fixed collar, theinner side, b of which is beveled or inclined, and having the grooves orcutter-seats b with parallel sides, and the cutters C, fitting the seatsb and having their ends inclined or beveled to t under and against theshoulders a* b*, substantially as and for the purpose herein described.

JAMES NEALE.

Witnesses:

J. O. HoRfroN, Jr., L. DAvrs.

